On http://campus.chamilo.org, I'm able to create math formula using the editor for exercice questions. However, the equations do not render properly in the quizz itself: it displays the TeX text of the equations, not the rendered equation. In other words, it renders well within CKEditor only.

It seems there are two problems:

Chamilo strips backslashes, so when I enter a formula like \frac{1}{\pi}, the generated HTML is only frac{1}{pi}.